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Additive for skim coat mortar and skim coat mortar composition containing the same

a technology of additives and skim coat mortar, which is applied in the direction of lignin material coatings, inks, protein coatings, etc., can solve the problems of different kinds of cellulose ether characteristics, cracks on the surface, and deterioration of workability, so as to improve workability and surface luster

Active Publication Date: 2014-07-03
LOTTE FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an additive for skim coat mortar that improves workability and surface luster. Additionally, the invention provides a skim coat mortar composition that includes the additive and improves workability and surface luster.

Problems solved by technology

However, there are differences in characteristics among various kinds of cellulose ether.
In case of low-viscosity cellulose ether, cracks may occur on a surface due to workability and quick drying of the skim coat mortar.
In case of high-viscosity cellulose ether, workability may be deteriorated due to a skinning phenomenon in which a film is formed on a surface of the skim coat mortar.
However, in case of adding some of the additives, there are a lot of lumps which are not well mixed, and as time goes on, a working surface becomes rough and a consistency of dough gradually increases, which may cause problems of working and complaints from workers and may reduce efficiency of working.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples 1 to 4

Preparation of Cellulose Ether

[0043]As listed in Table 1 below, four kinds of cellulose ether were prepared.

TABLE 1Cross-linkerCEViscosity(Cross-linkingItemType(cps)MeO (%)HEO (%)amount)AHEMC60,000239Glyoxal (1.5 wt %)BHEMC40,000239Glyoxal (1.5 wt %)CHEC1,250—57Glyoxal (0.5 wt %)DHEC3,000—65Glyoxal (0.5 wt %)

[0044]The four kinds of cellulose ether were blended at a blending weight ratio as listed in Table 2 to be described below. According to composition ratios as listed in Table 2 to be described below, the cellulose ether additive was mixed with a cement-based raw material which having white cement (Union Corporation), limestone, and slaked lime mixed at a weight ratio of 30:65:5, and then water was added thereto. Then, a worker blended the mixture with hands.

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Abstract

Provided are an additive for skim coat mortar and a skim coat mortar composition including the same, and the additive is a blend of cellulose ether having hydroxyalkylalkyl cellulose cross-linked with an aldehyde compound and hydroxyalkyl cellulose cross-linked with an aldehyde compound. By applying the additive to a skim coat mortar composition, it is possible to improve workability, surface luster, and a creamy property while maintaining a water retention property.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 201.2-0157191, filed on Dec. 28, 2012, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to an additive for skim coat mortar and a skim coat mortar composition including the same, and more particularly, to an additive for skim coat mortar capable of improving workability and surface luster by applying cellulose ether obtained by blending two or more kinds of cellulose ether having a different degree of substitution in a specific range, respectively, and a skim coat mortar composition including the same.[0004]2. Discussion of Related Art[0005]Cement mortar is a mixture of cement, aggregate, and other admixtures with water in the form of dough and can be classified into tile cement mortar, cement plaster, skim coat mortar, plain mortar, and the like dependi...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B16/02
CPCC04B16/02C04B28/00C04B28/02C04B2111/00482C04B14/28C04B22/064C04B24/383C04B41/45C04B26/24C04B24/30
Inventor LEE, A REUMKIM, SUNG HOONCHOI, NAK WOON
Owner LOTTE FINE CHEM CO LTD